ALSA: hda/realtek: Amend G634 quirk to enable rear speakers

Amends the last quirk for the G634 with 0x1caf subsys to enable the rear
speakers via pincfg.

Signed-off-by: Luke D. Jones <luke@ljones.dev>
Link: https://lore.kernel.org/r/20230704044619.19343-4-luke@ljones.dev


Signed-off-by: Takashi Iwai <tiwai@suse.de>